Printing-press.



BATBNTED FEB. 27, 1906.

G. B. SWINK. PRINTING PRESS.

APPLICATION FILED APB.22, 1905.

2 SHEETS-SHEET 1.

Inventor Witnesses; My

PATENTED FEB. 27, 1906'. G. B. SWINK.

PRINTING PRESS. APPLIOATION FILED APE.22, 1905. v

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

PRINTING-PRESS- Specification of Letters Patent.

Patented Feb. 2'7, 1906.

Application filed April 22, 1905. Serial No. 256.858.

To all whom it may concern.-

Be it known that I, CHARLES B. SWINK, a citizen of the United States, and a resident of Muscogee, Creek Nation, Indian Territory, haveinvented certain new and useful Improvements in Printing-Presses, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

My invention relates especially to improvements in printing-presses in which the bed is actuated by means of a crank-armprovided upon the main shaft of the press. In many presses of this class it is desirable for the sake of simplicity and compactness in construction to have the bedplate actuated directly by the crank. In larger presses, however, this construction is not practical, because of the relatively longdistance traveled by the bed, which would require a crank corresponding in length; and'one object of my invention is to provide intermediate mechanism between the bed-plate and the crank which will impart the necessary movement to the bedplate without undue lengthening of the crank. It is also often desirable in order to obtain precision in the timing of the bed-plate and cylinder to provide means of adjustment of the crank length and when such adjustment is made to securely lock the same; and a further object of my invention is to provide such adjusting means.

Other objects hereinafter set forth are attained by my invention, which consist in the new and novel features of construction and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a side elevation, partly in section, of the bed-plate of a printing-press which is provided with intermediate mechanism between the crank and the bed-plate, only such other parts of the press being shown as are necessary to illustrate the proper relation of.

the various parts of the press to each other. Fig. 2 represents a plan View of the construction shown in Fig. 1.

Referring now to the drawings, it will be seen that the press is provided with a frame a and standards 6, which support the cylinder 0. The bed 61 is mounted and movable in the usual manner upon guides e and rails e. The main shaft f is driven by pulley 9, Fig. 2, through gears g and g and is mounted in suitable bearings, one of which is provided in the frame of the machine and the other being secured upon the under surface of one of the rails supporting the bed-plate. It will be understood, of course, that the press is provided with all the other necessary parts of a working press, such as inking-r0 s and delivery mechanism; but such parts are not shown, as they have no relation to this invention.

Suitably secured to or formed integral with the bottom of the bed-plate is the slotted arm 7L. Within the slot is a roller or wrist-pin i, which is secured to the upper end of a swinging lever Said lever is provided at its lower end with aseotor is, which meshes with a rack Z, secured to the bottom of the frame. An extension-plate m is pivoted at any desired point, as n, to the swinging lever and is supported upon a cross-bar 0, which is secured in and movable with the roller-guides e, which carry the bed-plate. This eXtension plate is provided with a slot 29, which is engaged by a wrist-pin 9 upon the crank 1", which is keyed to the main shaft. In this construction it is evident that thelrotation of the crank will reciprocate the extension-plate upon the bearings provided for the cross-bar 0. Since the plate m is pivoted to the swinging lever, the reciprocation of the plate will rock the lever on the rack, which in turn will cause the bed-plate to travel backward and forward upon the roller-guides. The travel of the bed-plate is dependent upon the position of the pivot with relation to the swinging lever, and the nearer the pivotal point is to the bottom of the lever the greater will be the distance traveled by the bedplate.- In this way and by the increased leverage thus obtained the bed-plate is forced to travel a much greater distance than if it were actuated directly by the crank.

It is obvious that this construction can be used in presses of relatively large size, provided, of course, that both the slotted arm and the crank are of sufiicient length to give the desired movement of the bed-plate. As above noted, however, in the large presses an intermediate mechanism, such as the extension-plate, is preferable.

Although I have shown one form of extension-plate adaptedfor the carrying out of my invention, other forms within the skill of the mechanic may be used without departing from the spirit of my invention.

I claim as my invention 1. In a printing-press, the combination of a bed-plate, a swinging lever, a movable slotted plate pivoted to said lever, and a rotatable crank provided with a wrist-pin engaging in the slot provided in said plate, substantially as described.

2. In a printing-press, the combination of a bed-plate, a swinging lever provided at one end with a sector engaging with a fixed rack and at its other end with a wrist-pinengaging said bed-plate, a movable extension-plate pivoted to said lever and having a slot provided therein, and a rotating crank provided with a Wrist-pin engaging in said slot to reciprocate the plate and actuate said lever and bed, substantially as described.

3. In a printing-press, the combination of a bed-plate provided with a depending slotted arm rigidly secured thereto, a swinging lever provided at one end with a sector mesh ing with a fixed rack and at its other end with a wrist-pin engaging and movable in the slotted arm, a movable slotted plate pivoted to said swinging lever, and a rotatable crank having a wrist-pin engaging in the slot provided in said plate, substantially as described.

This specification signed and witnessed this 6th day of March, A. D. 1905.

CHARLES B. SWINK. In presence of J. L. WIsENER, W. R. EATON. 

